Stop motion for spinning machines



April 30, 1929. E. HARTLEY 1,711,092

STOP MOTION FOR SPINNING MACHINES Filed April 26, 1928 4 Sheets-Sheet l ATTORNEY.

April 30, 71929. E. HARTLEY 1,711,092

STOP MOTION FOR SPINNING MACHINES Filed April 26, 1928 4 Sheets-Sheet 2 INVEN TOR.

A TTORNEY.

April 30, 1929. E. HARTLEY 1,711,092

STOP MOTION FOR SPINNING MACHINES Filed April 26, 192B 4 ShUGt'S-SIIQM. 3

A TTORNEY.

April 30, 1929. E. HARTLEY STOP MOTION FOR SPINNING MACHINES:

Filed April 26, 1928 4 wi h 4 "I N VEN TOR.

A TTORNE Y.

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Patented Apr. 30, 1929.

UNITED STATES PATENT OFFICE.

ELLIS HARTLEY, OF WHITINSVILLE, MASSACHUSETTS, ASSIGNOR TO WHITIN MA- CHINE WORKS, 015' WHITINSVILLE, MASSACHUSETTS.

STOP MOTION FOR SPlNNING MACHINES.

Application filed April 26, 1928.

My invention has reference to an improvement in spinning machines and more parlirularl to an improvement in yarn stop motions for spinning machines.

in the usual operation of spinning machines, the yarn. when it breaks, breaks between the front drawing rolls and the bobbin on which it is wound, where the greatest strain on the yarn comes, in spinning the yarn. llhcu no stop motion is used, the drawing rolls will continue to ford the broken yarn, which usually winds up around the fronttop drawing roll until the machine is stopped. This causes considerable waste of yarn and loss of time in removing the waste yarn from the rolls and also loss in production while the machine is not in use.

The object of my invention is to provide a spinning machine with stop motions, whereby when the yarn breaks between the front cleaning rolls and the bobbin, the stop motion will automatically stop further feed of the broken yarn, without stopping the drawing rolls on the machine.

A further object of my invention is to in crease the production of spinning machines, by eliminating waste, when the yarn breaks, in spinning the yarn.

l ly the peculiar and novel construction of my improved stop motion, only the yarn that breaks is stopped from further feeding, while the rest of the machine continues to run.

My invention consists in the peculiar and novel construction of a yarn stop motion for stunning machines, said stop motion having details of construction, as will be more fully set forth hereinafter and claimed.

Figure l is a vertical front view of the .adjacent parts of a worsted spinning machine provided with my improved yarn stop molion, with some of the parts removed to more clearly show my invention.

Figure 2 is a vertical transverse sectional view through the spinning machine taken on line 2, 2 of Figure 1, looking in the direction of the arrow (1, and showing the unbroken yarn extending through the drawing rolls.

Figure 3 is a detail top plan view of the hand operated mechanism for re-setting the stop motion.

Figure 4, is a detail vertical end view of Figure 3.

Figure 5 is a detail vertical sectional view of the rear drawing rolls showing the yarn in the bite between the rolls, with that part Serial Nb. 273,061.

of the stop motion in its inactive position, taken on line 5, 5, and looking in the direction of the arrow 1), in Figure 2.

Figure (5 is a detail vertical sectional view similar to Figure 5 illustrating that the yarn has broken and that the stop motion has acted to move the yarn sidewise out of the bite of the drawing rolls and'into an annular yarn groove in the bottom drawing roll, where the yarn lies inactive, while the rolls continue to run.

liigure T is a detail vertical sectional View similar to Figure 5 of one set of the intermediate drawing rolls, with the yarn and stop motion in the same positions as in Figure 5, taken on line 7, 7, and looking in the direction of the arrow 0, in Figure 2.

Figure 8 is a detail vertical sectional view similar to l igure 6 of one set of intermediate drawing rolls, with the yarn and stop motion in the same positions as in Figure 6.

Figure 9 is a detail vertical sectional view of the front drawing rolls with the yarn and stop motion in the same position as in Figure 5, taken 011 line 9, 9, and looking in the direction of the arrow (Z, in Figure 2.

Figure 10 is a detail vertical sectional View of the front drawing rolls with the yarn and etc motion in the same positions as shown in igure 6 and looking in the direction of the arrow (Z, in Figure 2.

Figure 11 is an enlarged vertical end View of the lower front drawing roll, a portion of the upper front drawing roll and showing the stop motion in its inactive position in full lines and in the position it would assume when it acts automatically to stop feeding of the yarn, in broken lines, when the yarn breaks.

Figure 12 is a vertical view of Figure 11, looking in the direction of the arrow 6 in Figure 11 and showing the yarn in the bite of the drawing rolls, with the stop motion' in its inactive position in full lines and the positions the yarn and stop motion would assume, in broken lines, when the stop motion has acted to move the yarn sidewise out of the bite of the drawing rolls and into the annular yarn groove in the bottom drawing roll, where it lies inactive in the yarn groove, while the drawing rolls continue to run.

Figure 13 is a detail vertical sectional View of a modified form of lower front drawing roll taken on line 13, 13 of Figure 14, and

Figure 14 is an end view of Figure 13.

In the drawings A indicates the adjacent portions of a yarn spinning machine and 13 my improved yarn stop motion.

The parts of the spinning machine A shown in connection with my improved yarn stop motion, serve to illustrate the adjacent parts of the machine and consists of the usual angular bracket 0, supporting racks D, D and pinions E, E, which are supported in bearings on slides F, F, which in turn support the usual drawing roll fixtures G, G, and H the yarn, all of which are of well known construction and operated in the usual way. Y A part of my improved stop motion B is incorporated in the drawing rolls and is as follows. The lower front roll 1, the intermediate top rolls 2, 3 and 4 and the lower back roll 5, each have an off side annular yarn groove 6, as shown in Figures 5, 7 and 9. The upper front roll 7 is covered with leather 8, the upper intermediate rolls 2, 3 and 4 are of wood and the lower intermediate driven rolls, 9, 10 and 11 are of fluted metal.

The operating mechanism of my improved stop motion 13 is as follows. A square rod 12 extends parallel with the racks D, D and is supported at its forward end in a bearing 13, on an arm 14, secured underneath to an arm part A of the machine A, as shown in Figure M11. The rear end of the square rod 12 is sup- 30 ported in a bearing 15 on the rear slide F, as shown in Figure 2. Secured to this square rod 12 are a series of yarn shippers 16, 16, placed adjacent the drawing rolls. Each yarn shipper 16 has twovertical parallel yarn shipping pins 17, 17, which extend above and straddle the yarn H, as shown in Figure 7. One of the yarn shippers 16 has an ofi side arm 18 on which is an adjustable weight 19, as shown in Figure 5.

A cross arm 20 is secured to the forward end of the square rod 12. On the arm part A of the machine A is secured a lug 21 to which is pivotally secured a lever 22 having a lower arm 23, and an upper arm 24 terminating into a hook shaped end 25, which hooks over the cross arm 20, as shown in full lines in Figure 11, and holds the yarn shippers 16, 16 in their vertical positions, as shown in full lines in Figures 5, 7 and 8. Secured to the machine arm A is a vertical support 26, as shown in Figure 11, and pivotally secured to the upper end of the support 26 is a horizontal arm 27, having an adjustable weight 28. A bolt 29 having an adjusting nut 30, extends vertically downwards through an aperture in the arm 27 and is pivotally sccured at its lower end to the lower arm 23 of the lever 22. The arm 27 has a front downward extension 31 to which is secured a curved arm 32 terminating into an eye 33, through which the yarn H extends, as shown in Figures 2 and 11.

Secured to a front part of the machine A is a rod support 34 rotatably supporting a rod 35, which extends lengthwise of the machine through these supports. This rod support 34 has a fixed extension 36 with an overhanging stop shoulder 37, as shown in Figures 3 and 4 and in the vertical face of this extension 36 are two indentures, 38 and 39, as shown in broken lines in Figure 4. A bell-crank lever 40 having an arm 41 and an L shaped arm 42 is pivotally supported on the longitudinal rod 35. A sidewise extending lug 43 on the bellcrank lever 40 carries a spring actuated pointed pin 44 in a position for the pointed end of the pin 44 to snap into either of the V shaped indentures 38 or 39 in the extension 36. An arm 45 is fixed to the longitudinal rod 35 and extends under the lug 43 on the bell crank lever 40, the L shaped end of which extends under the curved arm 32. A hand lever 46 is secured to the longitudinal rod 35 at one end of the machine and this hand lever 46 is held upwards in its inactive position, by a helical spring 47, one end of which is secured to the hand lever 46 and the other end to a part of the machine A, as shown in Figures 1, 2 and 4.

In the modified form of top front roll 7, an annular ring groove 48 is formed in the roll on a line with the yarn groove 6 in the bottom front roll 1, and in thls annular ring groove 48 is a loose ring 49, contacting with the face of the lower roll 1 and covering the annular yarn groove 6, in the lower front roll 1. By this construction the ring 49 prevents lint, fiber or leather particles from filling up the yarn groove 6, in the front bottom roll 1.

The clirved arm 32, through the eye 33 of which the yarn H runs, is held in an upward or inactive position by the yarn H, as long as the yarn is being spun. The hook shaped end 25 of the arm 24 is hooked over and locked onto the cross arm 20 and all of the operating parts of the stop motion are in inactive positions, as shown in full lines in the drawings. The hand resetting mechanism of the stop motion is also shown in its inactive ition in full lines in the drawings and e yarn shippers 16, 16 are adjustably secured to the square rod 12. As shown in the drawings the hook shaped end 25 of the arm 24 is hooked over the left hand cross arm 20. The position of this part of the stop motion may be changed so that the hooked shaped end 25 will hook over the right hand cross arm 20, if desired.

In this case the annular yarn grooves 6, 6, will be off side in the right hand ends of the drawing rolls. The weight 28 is adjustable on the arm 27, so as to give just the required amount of weight to the curved arm 32, thereby eliminating undue strain on the .yarn H.

The operation of my improved yarn stop motion for spinning machines is as follows The greatest strain on the yarn comesbetween the front drawing rolls and the bobbin, where it is stretched or drawn out about eight to one, in spinning the yarn. When the yarn breaks between the front rolls and the bobbin,

III)

the curved arm 32 is released and drops down by gravity into the position as shown in broken lines in Figure 11. This lifts the arm 27, which engaging with the nut 30, lifts the bolt 29, which in turn operates the lever 22, to move its hook shaped end 25 off the cross arm 20, thereby unlocking and releasing the stop motion. The weighted off side arm 18 now falls by gravity and rocks the square rod 12, thus moving the yarn shippers 16, 16 into the position as shown in Figure 6 and a yarn shipper pin 17 engaging the yarn H moves the yarn H sidewise out of the bite of the rolls and into the yarn grooves 6, 6, in the drawing rolls, where it now lies inactive, while the drawing rolls and the machine continue to run.

When only one yarn has broken at any one time, the stop motion is reset and locked in its inactive position by pressing down on the arm 41 of the bell-crank lever 40. This causes the L shaped arm 42 to engage with and raise the curved arm 32, which lowers the arm 27 onto the opposite part of the cross arm 20, thus depressing the cross arm 20 and raising the yarn shippers 16, 16 and taking the yarn out of the annular grooves 6, 6 and into the bite or nip of the rolls, and through the weight of the bolt 29 and arm 23, moves the hook shaped end 25 of the arm 24 over the adjacent portion of the cross arm 20 and again locks the stop motion in its inactive position.

When a number of the yarns have broken at one time, the controlling stop motions may all be reset at one time, by moving the hand lever 46 downwards, against the tension of the heli cal spring 47. This raises the arms 45, 45, which engaging with the lugs 43, 43 on the L shaped arms 42, 42, raises the L shaped arms 42, 42 and with them the curved arms 32, 32 thereby resetting all of these stop motions, as described.

When the pointed spring actuated pin 44 snaps into the lower indenture 38, in the fixed extension 36, the bell crank lever 40 is held in the position as shown in full lines in Figure 4. When the pin 44 snaps into the upper indenture 39 in the fixed extension 36, the curved arm 32 is held in the position shown in full lines in Figure 2, for threading the yarn through the eye 33. The stop shoulder 37 on the fixed extension 36, limits the upward movement of the L shaped arm 42 and holds the eye 33 on the curved arm 32, in the right position for threading of the yarn through the eye.

My invention consists principally in means for automatically moving the yarn. when it breaks, out of the bite of the drawing rolls and into an inactive, stopped or dormant position. I therefore do not confine myself to the position of the annular yarn grooves in the drawing rolls or to the construction of the operating mechanism of my improved yarn stop motion, as the same could be varied and achieve the same valuable results in any kind of a spinnin machine.

Having t us described my invention I claim as new 1. In a spinning machine having the usual construction including racks, pinions and roll slides, drawing rolls on the roll slides, said drawing rolls having annular-grooves, yarn extending through the bite of the drawing rolls, a yarn stop motion including a rod parallel with the racks, yarn shippers on the rod and engaging the yarn adjacent the drawing rolls, a weighted arm on the rod, an off side arm on the rod, a hook shaped arm hooked over the off side arm on the rod and pivotally connected to a support on the machine, a front operating member operatively connected with the yarn in front of the front drawing rolls and pivotally connected to a support on the machine and mechanism operatively connecting the hook shaped arm with the front member, for the purpose as described.

2. In a spinning machine having the usual construction including drawing rolls and means for supporting the drawing rolls, said drawing rolls having ofi' side annular grooves, yarn extending through the bite of the drawing rolls, a yarn stop motion including a rod extending under the drawing rolls, yarn shippers on the rod and engaging the yarn, an off side weighted arm on the rod, an oppositely disposed off side square arm on the rod, a hook shaped arm hooked over the square arm on the rod, a downwardly curved front operating,

member in front of the front drawing rolls and having an eye through which the yarn passes, means for operatively connecting the curved front arms with the hooked shaped arm and means for operatively supporting the stop motion in the machine, for the purpose as described.

3. In a spinning machine, drawing rolls having off side annular grooves, yarn extending through the bite of the drawing rolls, a rod extending under the drawing rolls, yarn shippers on the rod and engaging the yarn, an oif side weighted arm on the rod, an oppo sitely disposed oif side square arm on the rod, a hook shaped arm hooked over the square arm on the rod and having a downwardly extending arm, a pivoted downwardly curved arm having an eye through which the yarn goes, a rearwardly extending arm fixed to the curved arm, an adjustable weight on the rearwardly extending arm, a link pivotally connecting the rearwardly extending arm with the downwardly extending arm on the hook shaped arm, means for operatively supporting the stop motion in its operative position in the machine and means for resetting the stop motion.

4. In a yarn stop motion as described and including a downwardly curved front operating member, a stop motion resetting mocha nism including a plurality of rod supports on the frame of the machine under the front drawing rolls, one for each stop motion, a rod extending through the rod supports and having a hand lever on one end, each rod support having a fixed extension with a stop shoulder and two indentures, a bell-crank lever pivoted on the rod and having a forwardly extending operating arm, a rearwardly extending L shaped arm in a position to engage with and raise the downwardly curved front arm of the stop motion, a boss on the L shaped arm, a spring actuated pin in the boss, in a position to snap into the indentures in the fixed extension on the rod support, and an arm fixed to the rod and extending under the boss on the bell-crank lever, in a position to engage with the boss.

5. In a spinning machine, top and bottom drawing rolls, the bottom roll having an elf side annular yarn groove, the top roll having a coinciding ofi side annular groove, a loose ring in the annular groove in the top roll, said loose ring contacting with the bottom roll and covering up the annular roove in the bottom roll, for the purpose as escribed.

6. In a spinning machine, top and bottom drawing rolls, the bottom drawing roll having an off side annular yarn groove, the top drawing roll having a coinciding 01f side annular groove, a loose ring in the annular groove in the top roll, said loose ring being larger than its amiular groove and contacting with the lower drawing roll by gravity, whereby the loose ring covers up the annular yarn groove in the lower drawing roll, for the purpose as described.

In testimony whereof, I have signed my name to this specification.

ELL s HARTLEY. 

